Capital Program Planning for Massachusetts Water Utilities

by | Oct 21, 2026

Massachusetts · Water & Wastewater Utilities

A century-old system, brand-new mandates. Your capital plan has to carry both.

Massachusetts water is overwhelmingly municipal — the MWRA and dozens of city systems running pipe that predates living memory, now facing lead-line removal, PFAS6 limits, CSO obligations, and a $2.1 billion redundancy tunnel all at once. When the mandate list moves, the project list has to move with it. Invizion helps Massachusetts utilities re-sequence a capital portfolio in a click — and defend every decision.

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The bottom line: Massachusetts water is a municipal system running century-old pipe under a stack of new mandates — MWRA’s $2.1B redundancy tunnel, 161 systems over the PFAS6 limit, a $200M lead-line pool, and CSOs — all chasing the same subsidized dollars. The utilities that win the decade will be the ones whose capital plans can absorb that and stay defensible.
3.1M1
People served wholesale water & sewer by the MWRA across 61 metro-Boston communities.
1612
Massachusetts public water systems found with PFAS6 above the state’s 20 ppt limit in MassDEP testing.
$200M3
MWRA zero-interest loan pool for lead service line replacement across member communities.
$10.4B4
Financed by the Massachusetts Clean Water Trust to date, reaching 97% of the state’s population.

The Massachusetts Landscape

Four forces are moving your project list at once

None of these is theoretical, and none of them waits for your next budget cycle. Together they mean the capital plan you approved last year may already be the wrong plan.

Aging Systems & Redundancy

A system built for the last century, with no room for error

The MWRA has invested more than $6 billion in facilities since 1985, yet the metropolitan water tunnels that carry Boston’s supply still have no backup — a single shutdown means boil-water orders for millions.1

The fix is the Metropolitan Water Tunnel Program: roughly 15 miles of new deep-rock tunnel carrying an estimated $2.1 billion, with construction running into the late 2030s and the tunnels planned to be in operation by 2040.5 A program that size reshapes every other line on a capital plan for a decade.

Compliance — Lead

Lead service lines, on a funded clock

Lead pipe is a New England legacy problem, and replacement is now a funded mandate. The MWRA has built a $200 million pool — $100 million approved in 2016 and another $100 million in 2024 — offering member communities 10-year, zero-interest loans plus a 25% grant when a community fully funds private-side removal.3

Through December 2025, only $72.4 million had reached 22 of 47 eligible communities — the money is available faster than plans can absorb it. The state SRF layers on 0%-interest loans specifically for lead service line replacement.6

Compliance — PFAS

PFAS6 arrived early, and the federal rule is stricter

Massachusetts set its PFAS6 drinking-water limit — 20 nanograms per liter for the sum of six PFAS compounds — on October 2, 2020, well ahead of Washington.7 MassDEP’s free testing program then found 161 public water systems above that limit out of the 1,171 tested (about 80% of the state’s active systems).2

The federal MCLs finalized in 2024 go further — 4 ppt each for PFOA and PFOS — with compliance due by 2029 (extendable to 2031). Treatment for one contaminant rarely fits neatly into an existing plan.8

Wastewater & CSOs

Combined sewers that still overflow when it rains

Massachusetts’ older cities run combined sewers that discharge to rivers and the harbor during storms. The MWRA’s long-term control plan, completed in 2015, cost about $906 million and cut typical-year CSO discharge by 88% — roughly 2.8 billion gallons a year — but dozens of active outfalls remain.9

CSO mitigation is an eligible use of the state’s Clean Water SRF, so the work competes for the same subsidized dollars as renewal, lead, and PFAS.10 Something on the list has to give.

Who Runs Massachusetts’ Water

A municipal state, wholesaled through the MWRA

Massachusetts water is run almost entirely by cities, towns, and public authorities. The MWRA wholesales water and sewer service to 61 metro-Boston communities, while a long tail of local systems — and a small handful of investor-owned utilities — run the pipes to the tap.1

Municipal & public systems

Rates set by city councils, commissions & district boards

Massachusetts Water Resources Authority (MWRA) 3.1M people · 61 communities · wholesale water & sewer1
Boston Water and Sewer Commission 1M+ people served · buys treated water from MWRA11
Springfield Water and Sewer Commission Regional supplier · $250M WIFIA renewal loan (2021)12
Worcester DPW Water Operations New England’s 2nd-largest city · own reservoir supply
Cambridge Water Department One of few metro systems with its own source (Fresh Pond)

MWRA’s Quabbin and Wachusett reservoirs hold about 477 billion gallons combined, with a safe yield near 300 MGD; 2024 demand averaged just 201.2 MGD — supply is a relative strength here, aging delivery infrastructure is not.13

Investor-owned & special districts

IOU rates regulated by the Department of Public Utilities (DPU)

Aquarion Water Company of Massachusetts IOU serving Hingham, Hull & Cohasset · being acquired by Unitil (2025)14
Dedham-Westwood Water District Regional water district
~1,400+ public water systems statewide Most municipal; many small & rural2

Massachusetts has relatively few investor-owned water utilities; Aquarion’s Massachusetts and New Hampshire subsidiaries were agreed to be sold to Unitil in 2025, while its Connecticut operations transfer to a public authority.14

Rate-Setting & Oversight

Every capital dollar has to be defensible

Most Massachusetts systems answer to a city council, commission, or district board rather than a regulator — but the question is the same everywhere: why this project, why now, why at this cost?

  • City councils, commissions & district boards set rates and approve capital for the state’s municipal systems — in public, in front of ratepayers. There is no PUC backstop to blame.
  • Department of Public Utilities (DPU) regulates rates for the state’s few investor-owned water utilities, such as Aquarion — whose Massachusetts operations are being acquired by Unitil.14
  • MassDEP holds Safe Drinking Water Act primacy — enforcing the state’s 20 ppt PFAS6 limit, lead service line inventories, and the compliance capital that follows.7
  • Federal PFAS & lead rules now drive the calendar — EPA’s 4 ppt PFOA/PFOS MCLs (compliance by 2029–2031) and lead-line replacement mandates stack on top of local priorities.8

Funding On The Table

The money is moving — can your plan absorb it?

Massachusetts utilities have more subsidized capital available than in a generation. The constraint is no longer only dollars — it’s readiness: which projects are shovel-ready, which qualify, and how the timing lines up with everything else on the list.

  • Massachusetts Clean Water Trust has financed roughly $10.4 billion for nearly 300 borrowers, reaching 97% of the state’s population, through the Clean Water and Drinking Water SRFs.4
  • Subsidized SRF rates — a 2% standard loan, dropping to 0% for PFAS remediation and lead service line replacement projects, subject to available funds.6
  • $200M MWRA lead-line loan pool — 10-year zero-interest financing plus a 25% grant option; $72.4 million distributed to 22 communities through 2025.3
  • $250M WIFIA loan closed by the Springfield Water and Sewer Commission (2021) for its water and wastewater renewal program — a template for large-system federal financing.12
  • Clean Water SRF for CSOs & nutrients — CSO mitigation is SRF-eligible, and nutrient-reduction projects can qualify for 0% interest.10

Where Invizion Fits

Turn a moving Massachusetts picture into a defensible capital plan

Invizion is scenario-based capital portfolio optimization built for water utilities. When the supply picture shifts, a mandate lands, or a grant comes through, you don't re-plan by hand for weeks — you model it and decide with a record you can stand behind.

1

Model the “what-if” before it's forced on you

A new mandate, a failed main, a grant with a deadline — build the scenario and see the impact on the whole portfolio, side by side with today's plan.

2

Re-sequence 500 projects in a click

When priorities move, Invizion re-orders the portfolio automatically — accelerating, stretching, or deferring projects against the constraints you set, not weeks of spreadsheet surgery.

3

Give regulators or your board a defensible record

Every prioritization and trade-off is captured. When you're asked “why this project, why now,” the answer is documented — not reconstructed after the fact.

Massachusetts Water, In Brief

Questions Massachusetts utility leaders are asking

Short, sourced answers — the same facts we’ll dig into on a call, in the context of your system.

How much lead-line funding is available through the MWRA, and how fast is it moving?
The MWRA has assembled a $200 million loan pool — $100 million in 2016 and another $100 million in 2024 — offering 10-year, zero-interest loans and a 25% grant when a community fully funds private-side removal. Through December 2025, $72.4 million had reached 22 of 47 eligible communities, so the constraint is project readiness, not dollars. The state Drinking Water SRF adds 0%-interest loans for lead work as well.36
How many Massachusetts water systems have a PFAS problem?
Massachusetts set an early PFAS6 limit of 20 ppt in October 2020. MassDEP’s free testing program then found 161 public water systems above that limit out of 1,171 tested — roughly 80% of the state’s active systems. The federal MCLs finalized in 2024 (4 ppt for PFOA and PFOS) are stricter still, with compliance due by 2029–2031, so many more systems will need treatment capital.28
What is the Metropolitan Water Tunnel Program and why does it matter to my plan?
It is the MWRA’s roughly $2.1 billion program to build about 15 miles of new deep-rock water tunnel so the existing metro tunnels can finally be taken offline for maintenance without risking a supply outage. Construction runs into the late 2030s, with the tunnels planned to be operational by 2040 — a commitment of that scale reshapes the sequencing of nearly everything else on a member community’s capital plan.5
Who sets my water rates in Massachusetts?
For the great majority of Massachusetts systems — municipal departments, commissions, and districts — rates and capital budgets are approved by city councils, commissions, or district boards, not by a state regulator. Only the state’s few investor-owned utilities, such as Aquarion, have rates regulated by the Department of Public Utilities. Either way, capital spending has to be justified publicly to a governing body and to ratepayers.14
What subsidized funding can a Massachusetts utility actually count on?
The Massachusetts Clean Water Trust has financed about $10.4 billion to date through the Clean Water and Drinking Water SRFs, reaching 97% of the state’s population, at a 2% standard rate that drops to 0% for PFAS and lead work. Larger systems can also tap federal WIFIA loans — Springfield closed a $250 million WIFIA loan in 2021 — and MWRA members can draw on the $200 million lead-line pool.412
How does Invizion help Massachusetts water utilities plan capital?
Invizion is scenario-based capital portfolio optimization built for water utilities. When a PFAS deadline moves up, a lead-line loan lands, or the MWRA tunnel assessment reshapes your wholesale costs, you don’t re-plan by hand for weeks — you model the change, watch it ripple across the whole project list, and re-sequence the portfolio in a click against the constraints you set. Every prioritization and trade-off is captured, so when your council, commission, or the DPU asks ‘why this project, why now,’ the answer is documented rather than reconstructed. The best next step is a short first meeting to look at it against your own program.

Go Deeper

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About the Author

GB

Guy Barlow

President, Invizion

Guy Barlow leads Invizion, a capital lifecycle management platform for water and wastewater utilities. He has spent two decades at the intersection of utility capital programs, funding, and analytics, helping utilities make faster, more defensible capital decisions.

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This briefing was last reviewed September 2026.

Sources

  1. Massachusetts Water Resources Authority, “About MWRA” — wholesale water & sewer to 3.1M people and 5,500+ large users in 61 communities; est. 1984; $6B+ invested since 1985, 2025. mwra.com
  2. MassDEP, “Free PFAS Analysis Program Final Report” — 1,171 public water systems tested (~80% of active PWS); 161 systems above the 20 ppt PFAS6 MCL, 2019–2022. mass.gov
  3. MWRA, “Lead Service Line Replacement Program” — $200M loan pool ($100M 2016 + $100M 2024), 10-year 0% loans, 25% grant; $72.4M to 22 of 47 eligible communities through Dec 2025. mwra.com
  4. Massachusetts Clean Water Trust — ~$10.4B financed for nearly 300 borrowers, serving 97% of the Commonwealth’s population, 2026. mass.gov
  5. MWRA, “Metropolitan Water Tunnel Program” — ~$2.1B, ~15 miles of new deep-rock tunnel for redundancy, in operation by 2040, 2024–2025. mwra.com
  6. MassDEP, “Drinking Water State Revolving Fund (SRF) Program” — 2% standard loan; 0% for PFAS remediation and lead service line replacement, subject to available funds, 2025. mass.gov
  7. MassDEP, “Per- and Polyfluoroalkyl Substances (PFAS)” — PFAS6 MCL of 20 ng/L (ppt) for the sum of six PFAS, effective October 2, 2020. mass.gov
  8. MassDEP, “PFAS in Drinking Water” — federal EPA MCLs of 4 ppt each for PFOA and PFOS (April 2024), compliance by 2029 (extendable to 2031). mass.gov
  9. MWRA, “Combined Sewer Overflow (CSO) Control” — ~$906M long-term control plan (completed 2015), typical-year CSO discharge cut 88% (~2.8B gallons/yr). mwra.com
  10. MassDEP, “Clean Water State Revolving Fund (SRF) Program” — 2% standard loan; CSO mitigation eligible; 0% for qualifying nutrient-reduction projects, 2025. mass.gov
  11. Boston Water and Sewer Commission, “About” — drinking water and sewer to 1M+ people daily; created 1977; purchases treated water and wastewater treatment from MWRA. bwsc.org
  12. U.S. EPA, WIFIA Closed Loans — Springfield Water and Sewer Commission $250M loan, Water and Wastewater Infrastructure Renewal Program, closed August 19, 2021. epa.gov
  13. MWRA, “Reservoirs & Watersheds” — Quabbin (412B gal) + Wachusett (65B gal) = ~477B gal; safe yield ~300 MGD; 2024 demand averaged 201.2 MGD. mwra.com
  14. Wikipedia, “Aquarion Water Company” — Eversource acquired Aquarion for $1.675B (2017); 2025 sale sends CT ops to a public authority and the MA & NH subsidiaries to Unitil. en.wikipedia.org